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Zircon ZrSiO

As mentioned, zircon (ZrSiO ) has many forms, but the most used is the transparent crystal that is cut to resemble a diamond. There is even one form of zirconium used in medicine zirconium carbonate (dZrO COj HjO), which, as a lotion, can be used to treat poison ivy infections. [Pg.124]

Zirconium(IV) oxide reacts with phosgene at 400 C to give zirconium(lV) chloride [360], and zircon (ZrSiO ) reacts with phosgene between 1000 and 1250 C to give ZiCl [120]. Phosgene has been postulated as an intermediate in the chlorination of zircon [1943], anatase or rutile [1767]. [Pg.374]

The calculated hardnesses are somewhat less than the observed values. The results are consistent because the values obtained with a = 1 represent the lower boundaries for hardness. In addition, the small differences between calculated and observed values constitute a sound argument in favor of formula (34). It should be noted that the values indicated for celestite and baritite were obtained by assuming that formula (28) is applicable up to a value q = 6. Moreover, the X-ray absorption gives for the zirconiiam atom in zircon (ZrSiO ) a net charge of 1.6. According to formula (34), the hardness would be about 7.2. The experimental value is located between 7.0 and 7.5. [Pg.50]

Zircon (ZrSiO,) and fused zirconia (ZrO,) Fused silica... [Pg.631]

Tetragonal U mm D Ditetragonal-dipyramidal (= holohedral) Zircon, ZrSiO, 15... [Pg.1214]

Most important mineral Zircon ZrSiO (Figure M30). Some forms of zircon have excellent gemstone qualities. Baddeleyite ZrOj. The zirconium in nature contains 0.5-2 % hafnium. [Pg.511]

The mineral zircon ZrSiO is used for moulds in foundries. Its high thermal conductivity improves the coohng rate compared to other mould materials. Zirconium oxide is used in firebricks. It has very good temperature resistance and is, after sintering, also used for crucibles and other components for work at high temperatures. When zirconia is heated, a phase transformation occurs at a temperature of about 1200°C. [Pg.517]

Zircon ZrSiO,j Tetragonal prisms. Various colors. The colorless... [Pg.906]

M30 Zircon ZrSiO,j, tetragonal crystals. From Brevik in Norway. The prismatic form is visible in combination with the pyramid. [Pg.1295]

See other pages where Zircon ZrSiO is mentioned: [Pg.16]    [Pg.149]    [Pg.547]    [Pg.549]    [Pg.6]    [Pg.370]    [Pg.97]    [Pg.263]    [Pg.199]    [Pg.692]    [Pg.780]    [Pg.788]    [Pg.2003]    [Pg.2188]    [Pg.684]    [Pg.772]    [Pg.780]    [Pg.1949]    [Pg.2134]    [Pg.2170]    [Pg.2351]    [Pg.11]    [Pg.356]    [Pg.168]    [Pg.172]    [Pg.240]    [Pg.576]    [Pg.671]    [Pg.754]    [Pg.762]    [Pg.1827]    [Pg.1976]    [Pg.766]    [Pg.876]    [Pg.2124]    [Pg.2323]    [Pg.730]    [Pg.818]    [Pg.826]    [Pg.764]    [Pg.866]    [Pg.874]   
See also in sourсe #XX -- [ Pg.4 , Pg.59 , Pg.126 ]

See also in sourсe #XX -- [ Pg.4 , Pg.239 , Pg.247 , Pg.248 ]



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Minerals zircon, ZrSiO

Zircon

Zirconate

Zirconates

ZrSiO

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